Admittedly,I haven't used it very much but find it okay for what it offers. The only real problem I have is learning how to set it up for different harmonies and have it follow the chords of amidi track. I know you must set the GM to vocal but then what ? The manual seems to not give you any options for midi play.

I have no problem doing this on my G70.
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact